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From: d87-vik@dront.nada.kth.se (Ville K{rkk{inen)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Int 10H Function 13H - How Do I access BP from C ?
Message-ID: <1990Oct21.204236.22011@nada.kth.se>
Date: 21 Oct 90 20:42:36 GMT
References: <1990Oct19.202013.28397@nada.kth.se>
Sender: news@nada.kth.se (Mr News)
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 21

Forgive me for not mentioning that I am aware of the existance of functions
intdos,int86 and int86x. In fact I am using all of these, each when appropiate.

So I just like to add this to my original posting  before I drown in answers 
like "RTFM- use int86x.....!!!". The problem is *NOT* as easy as might be
seen in a quick first glance. I have had no problems whatsoever using other
functions that requires a pointer to some data to be stored as a segment and 
and an offset in that segment. 

My problem is that Int10h - Func13h requires the offset of my data to be stored
in BP,that is, the BasePointer. Note this,BP is a pointer, not a register
defined in the REGS union. Some of my answers has been quite helpful though,
I have been told of the existance of a "regpacks" struct defined somewhere
in TC (I'm stuck to MS-C 5.1), where the BP was accessible in "r_bp".
So my problem is not a  "what to do" one, but a "how to do".

Any hints to where I can find a similar structure defined in MS-C appreciated.

So please have patience with me and give it a little thought.

Ville.